Understanding Human Behaviour and Error

Human Error Copyright Human Reliability Associates Ltd - 1 - Understanding Human Behaviour and Error David Embrey Human Reliability Associates 1, School House, Higher Lane, Dalton, Wigan, Lancashire. WN8 7RP 1. The Skill, Rule and Knowledge Based Classification An influential classification of the different types of information processing involved in industrial tasks was developed by J. Rasmussen of the Ris Laboratory in Denmark. This scheme provides a useful framework for identifying the types of Error likely to occur in different operational situations, or within different aspects of the same task where different types of information processing demands on the individual may occur. The classification system, known as the Skill, Rule, Knowledge based (SRK) approach is described in a number of publications, Rasmussen (1979, 1982, 1987), Reason (1990). An extensive discussion of Rasmussen s influential work in this area is contained in Goodstein et al (1988) which also contains a comprehensive bibliography.

The categorization set out in Figure 4 is a broad classification of the causes of human failures which can be related to the SRK concepts discussed in the last section. The

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